The arc welding power system, if used correctly, can be operated in very safe conditions while if the prescribed safety norms are not observed it could cause serious damages to people and objects. TABLE OF CONTENTS INSTRUCTIONS FOR ELECTROMAGNETIC COMPATIBILITY METHODS OF REDUCING EMISSIONS SECTION 1 --- SAFETY 1.1 INTRODUCTION 1.2 GENERAL PRECAUTIONS SECTION 2 --- GENERAL DESCRIPTIONS AND PRODUCT SPECIFICATIONS 2.1 INTRODUCTION 2.2 SYSTEM DESCRIPTION 2.5 TECHNICAL SYMBOLS EXPLANATION 2.6 PROTEC